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Patent Searching and Data


Title:
PRODUCTION METHOD FOR OPTICAL FIBER BASE MATERIAL, AND OPTICAL FIBER BASE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2022/050190
Kind Code:
A1
Abstract:
A production method for an optical fiber base material made of silica glass, the method comprising: forming a core part; forming, around the core part, a cladding part having a refractive index lower than that of the core part, wherein the forming the core part includes adding alkali elements including an alkali metal element and an alkaline-earth metal element to an inner surface of a glass pipe made of silica glass, and, after the adding, integrating the glass pipe with a glass rod disposed inside the glass pipe to form an integrated rod.

Inventors:
SAKUMA HIROTAKA (JP)
KAWAGUCHI YUKI (JP)
Application Number:
PCT/JP2021/031564
Publication Date:
March 10, 2022
Filing Date:
August 27, 2021
Export Citation:
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Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
C03B37/018; C03B37/012
Domestic Patent References:
WO2017164025A12017-09-28
WO2013111470A12013-08-01
WO2016021576A12016-02-11
WO2020027063A12020-02-06
Foreign References:
JP2019019013A2019-02-07
JP2015157726A2015-09-03
JP2005537210A2005-12-08
US20150316712A12015-11-05
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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